Write sharding in DynamoDB - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is write sharding in DynamoDB?

Write sharding is a technique to spread write requests across multiple partitions or keys to avoid hot partitions and improve write throughput.

beginner

Why do we use write sharding in DynamoDB?

We use write sharding to prevent a single partition from receiving too many writes, which can cause throttling and slow performance.

intermediate

How can you implement write sharding in DynamoDB?

You can add a random or calculated suffix/prefix to the partition key to distribute writes across multiple keys, effectively creating multiple shards.

beginner

What is a hot partition in DynamoDB?

A hot partition is a partition that receives a disproportionate amount of traffic, causing throttling and reduced performance.

beginner

What is a common sign that write sharding is needed?

If you see throttling errors or slow writes on a single partition key, it usually means write sharding is needed to spread the load.

What problem does write sharding solve in DynamoDB?

A Slow reads only

B Data duplication

C Hot partitions causing throttling

D Indexing errors

Write sharding spreads writes to avoid hot partitions that cause throttling.

How do you create shards in write sharding?

A By adding a random suffix or prefix to the partition key

B By changing the sort key only

C By increasing read capacity units

D By deleting old data

Adding a random suffix or prefix to the partition key distributes writes across multiple keys.

What is a hot partition?

A A partition with too many writes causing throttling

B A partition with no data

C A partition used only for reads

D A partition with encrypted data

A hot partition receives too many writes, leading to throttling.

Which of these indicates you might need write sharding?

A Low storage space

B Too many read requests

C Data inconsistency

D Throttling errors on a single partition key

Throttling errors on a single partition key suggest write sharding is needed.

Write sharding improves which aspect of DynamoDB?

A Read latency

B Write throughput

C Backup speed

D Data encryption

Write sharding improves write throughput by distributing writes.

Explain what write sharding is and why it is important in DynamoDB.

Think about how spreading writes helps performance.

Describe how you would implement write sharding in a DynamoDB table.

Consider changing the partition key to create multiple shards.